Arches Aquarelle 240 Grams Rag Watercolor Photo Paper 13x19 - Box of 25 is 100% rag, water-resistant and mould-made, it is extremely age-resistant and has a textured surface and a warm white tone. It is compatible with pigmented and dye inks. Designed to meet galleries and museum longevity requirements and respect the ISO 9706 standard, it dries instantly, is acid-free and internally buffered to resist gas fading and maximize the conservation of prints.